HRS Systems, Inc. 
AN INTRODUCTION TO HASS®
HASS (Hydraulic Analyzer of Sprinkler Systems) was first licensed in 1976 as a tool for easy use by engineers, sprinkler contractors and reviewers alike. Now, HASS gives you the tools you needto determine water supply adequacy based on system demand and distribution piping. With HASS, you can perform hydraulic analysis in accordance with NFPA 13, 13D, 13R, 14, 15, 20, 24, 750 and other standards, calculating any connection of nodes and pipes. And . . . you get major revisions, year in and year out with improvements or new features at no extra charge.
You can use the windows-based HASS 7(X) series for sprinkler systems (grids, trees, and loops), water spray fixed systems, standpipe systems, yard main (hydrant) systems, AFFF systems, and any other flow of water through pipes under pressure . . . systems with multiple sources, multiple pumps(with a tank, reservoir, or public main), or multiple fixed pressure loss devicesor multiple riser feeds with no limit to the K-factor of the flowing nozzle or sprinkler. You can readily adjust pipe sizes as you optimize the design. What’s more, you can calculate with velocity pressures as well as the Darcy-Weisbach formula.
HASS gives you more than just the ability to calculate. For grid systems, the Grid Estimatorgives proposed sizes, and automatically generates node and pipe data. Similarly, the Tree Generatorgives node and pipe data using the ordinary hazard piping schedule, or uses pipe sizes you specify. When you use the System Builder, you can combine pipe segments into branch lines, locate cross mains and riser nipples, and then let the System Builder automatically generate node and pipe data . . . ideal for more complex piping arrangements such as multiple cross main grids. (In each of these cases, the Pipe-to-Source Optionlets you tie the system to the source before generating data.)
HASS gives you a battery of Utilities, File and Search abilities so you can develop equivalents for a K-factor, branch line, rolled grooves, or fitting lengths as well as summarize flow test results, merge two data files, renumber node/pipe tags in sequential order, set program defaults and adjust various operational range settings.
HASS printed reports follow the NFPA 13 format and include calculation results as well as graphics N1.85 water supply curves and flow diagrams. A review of other HASS benefits follows below. (Those introduced with the HASS 7.X series, are given first.)
HASS HOUSE® is added as a complete program utility for Residential Sprinkler System Analysis. (7X)
A SPECIAL HASS READER lets you e-mail calculation results that cannot be modified by the recipient. (7.X)
FILE GENERATION prepares the report to be posted to the drawing. (7.X)
EARTHQUAKE BRACING LOAD CALCULATIONS give you what you need to select bracing materials. (7.X)
DARCY-WEISBACH FORMULA lets you calculate water mist systems (NFPA 750), foam concentrate and other liquids. GRAPHICS SYSTEM DISPLAY lets you determine connectivity, generate X-Y coordinates and see a three-dimensional overview. PROPAGATE PIPE TABLE PAGE for a new pipe type, automatically generates fitting lengths based on NFPA 13 requirements.
HAMMER UTILITY analyzes water hammer resulting from rapid deceleration of water flow in pipes. (7.X)
WATER SUPPLY SUMMARY UTILITY lets you roughly evaluate an added booster pump, fire pump and tank, or gravity tank. (7.X)
FIRE PUMP PERFORMANCE ANALYSIS lets you compare baseline, historical and current test results and print a report. (7.X)
LOOP TESTING to assure no obstructions, with pre-planning, performance (valve operations), and historic results comparisons.
HYDRAULIC GRADIENT UTILITY lets you analyze the performance of underground piping. (7X)
AUTOMATIC PEAKING THE GRID proves the remote area and report notes minimize the number of copies submitted. MINIMUM PIPESIZES are determined by the GRID ESTIMATOR.
MINIMUM END HEAD FLOW OR PRESSURE (single or multiple nodes), as well as total supply, calculates quickly.
DENSITY AND AREA SPECIFICATION on a per node basis, gives an alternative to minimum end head flow.
VELOCITY PRESSURES can be used in deluge system calculation, as required by NFPA 15.
AUTOMATIC FITTING LENGTH ADJUSTMENT is based on Schedule 40 data, as required by NFPA 13.
VIRTUALLY UNLIMITED SYSTEM SIZE allows more than 2,000 nodes to calculate in just a few minutes.
HELP SCREENS provide advice and direction on request.
AUTOMATIC SAVE prevents loss of all data on power failure, and allows data entry in more than one session.
CUSTOMIZE PROGRAM DEFAULTS lets you specify the upper and lower limits for certain values within HASS.
PIPE TABLE entry by nominal diameter and fittings by letter speeds up data entry even more.
INTELLIGENT TAG GENERATION assigns the next sequential tag from the current tagging scheme.
ASSIGN AND RECALL lets you copy and paste selected data for up to ten individual nodes or pipes for rapid data entry
RECORD AND PLAYBACK lets you repeat up to ten different series of nodes or pipes for rapid data entry .
EQUIVALENT CALCULATORS (K-factors, branch lines, grids, rolled grooves, & fitting lengths) increase ease of data entry.
SYSTEM BUILDER develops complex piping arrangements (especially THREE CROSS MAIN GRIDS).
PIPE-TO-SOURCE option ties the system to the source before developing the Grid, Tree, or more complex systems.
NODE & PIPE DATA are automatically generated by the GRID ESTIMATOR, TREE GENERATOR & SYSTEM BUILDER.
DELUGE OPTION automatically generates a system with all sprinklers flowing.
FIRE PUMP entry is by rated flow and pressure or by five points of pump curve.
METER, BACKFLOW PREVENTER AND PRESSURE REDUCER entry is by manufacturer's pressure loss data.
GLOBAL AND INDIVIDUAL CHANGES speed up the editing process for both nodes and pipes.
INSERT AND DELETE lets you make node or pipe changes at any point in the data sequence.
FIND AND REPLACE lets you change attributes for data fields in the same column, and confirm each change.
MERGE option lets you tie one system to . . . and feed it from . . . another system.
RENUMBERING option lets you provide a smooth numerical sequence for any extensive node and pipe revisions.
FLOW TEST UTILITY simplifies the reporting of test results.
AUTOMATIC POSTING of coversheets and riser nameplates keeps data updated whenever a data file is recalculated.
MISSING PIPE IDENTIFIER locates points of discontinuity, where manual pipe data entry maybe in error.
NEGATIVE PRESSURES are permitted at non flowing nodes.
PRINTED REPORTS follow the NFPA 13 format.
PIPE TABLE VERIFICATION assures that the pipe table for printing matches the pipe table used for data entry.
REPORTS display on the screen, and print as a quick copy or in a detailed format for routine submittal.
DELUGE REPORTS can show required and actual densities for each node listed.
COVERSHEETS AND RISER NAMEPLATES are developed from templates, saved and printed with reports.
N1 .85 WATER SUPPLY ANALYSIS, LAYOUT AND FLOWPLOT DIAGRAMS use graphics displays / printouts.
Computer Requirements: We recommend using a computer equipped with Windows 98 or higher, and a CD-ROM drive.
Operator Requirements: Most HASS users have experience in sprinkler system design, layout or review. HASS was designed for those with sprinkler knowledge and capable of making value judgments concerning the calculations. After all, the operator is the one who is responsible for proper use of the HASS program as a tool in completing a given design or layout. You will want to spend some time with HASS using sample data and various options before you begin serious use. If you need us, just phone, fax or e-mail at no additional charge.
HASS Program Results: Here is an example you can quickly develop on the same day you load HASS on your computer. First, you call up the Grid Estimator followed by the Pipe-to-Source Option, and enter your responses. Next, HASS estimates pipe sizes and automatically generates all nodes and pipes needed for the grid system layout. After you review the data for accuracy, HASS provides final calculations (with automatic peaking and minimum end head flow) and prints the results for submittal.
We would like to hear from you. You can phone us at 770.934.8423, fax 770.934.7696 or e-mail hass@hrssystems.com so we can take your order. Usually, we can ship on the next business day.